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The Turner Microphone company was founded by David Turner and Everett Foster in Cedar Rapids, Iowa in 1931. The company soon began making microphones and public address systems. Turner opened a larger factory in 1936 and produced a large quantity of microphones and grew to 1200 employees by the 1970s. The company was sold to Telex in 1978 and ...
SwitchCraft 2501F/2501M. This is the part number for a Swichcraft connector used with high impedance microphones up through about 1980. It was intended for coax style cable up to 0.281 inches (7.1 mm) outside diameter. Attachment is made with a 5/8-27 threaded ring that can be unthreaded over the body of the connector body allowing the female ...
A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...
Phone connector (audio) Phone plug mated in a phone socket. The plug's grooved tip is held firmly by the socket's spring tip contact. When not mated, this spring instead connects to the flat switch contact for detecting a plug. A phone connector is a family of cylindrically -shaped electrical connectors primarily for analog audio signals.
The Thing, also known as the Great Seal bug, was one of the first covert listening devices (or "bugs") to use passive techniques to transmit an audio signal. It was concealed inside a gift given by the Soviet Union to W. Averell Harriman, the United States Ambassador to the Soviet Union, on August 4, 1945.
XLR3 cable connectors female (left) and male. The XLR connector is a type of electrical connector primarily used in professional audio, video, and stage lighting equipment. XLR connectors are cylindrical, with three to seven connector pins, and are often employed for analog balanced audio interconnections, AES3 digital audio, portable intercom, DMX512 lighting control, and for low-voltage ...
Star quad cable. Star-quad cable intended for use with a single two-wire circuit or two two-wire circuits. It is often used with microphone signals in professional audio. Star-quad exploded view showing the geometric centers of the dual-conductors used for each leg of the balanced line. To achieve magnetic immunity, geometric centers of both ...
Phantom power, in the context of professional audio equipment, is DC electric power equally applied to both signal wires in balanced microphone cables, forming a phantom circuit, to operate microphones that contain active electronic circuitry. [ 1] It is best known as a convenient power source for condenser microphones, though many active ...